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发明名称
ELECTRICAL RESISTANCE ELEMENT
摘要
申请公布号
CA390533(A)
申请公布日期
1940.08.06
申请号
CAD390533
申请日期
申请人
P. R. MALLORY AND CO.
发明人
HAL F. FRUTH
分类号
主分类号
代理机构
代理人
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